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Fix a potential NULL pointer dereference in the geopoly_overlap() routine

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of the GeoPoly extension.

FossilOrigin-Name: b5665712e667a20d42a2e892d9d540f4273609eabd56f8178e1d5664280821f3
This commit is contained in:
drh
2020-11-25 15:29:08 +00:00
parent f82d78e9c2
commit 3ef2cb5991
3 changed files with 8 additions and 8 deletions
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2
ext/rtree/geopoly.c
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@ -1075,7 +1075,7 @@ static int geopolyOverlap(GeoPoly *p1, GeoPoly *p2){
geopolyAddSegments(p, p1, 1);
geopolyAddSegments(p, p2, 2);
pThisEvent = geopolySortEventsByX(p->aEvent, p->nEvent);
rX = pThisEvent->x==0.0 ? -1.0 : 0.0;
rX = pThisEvent && pThisEvent->x==0.0 ? -1.0 : 0.0;
memset(aOverlap, 0, sizeof(aOverlap));
while( pThisEvent ){
if( pThisEvent->x!=rX ){